Valve.



1. A. KEISTER.

VALVE.

APPLICATION man FEB. 21. 1916.

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' prowl} JOHN A. KEISTER, OF ST. LOUIS, MISSOURI. I

VALVE.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed February 21, 1916. Serial No. 79,505.

To all whom it may concern Be it known that I, JOHN A. KEISTER, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves, and, more particularly to a valve-control for the outwardly communicating passage of a chamher or the like adapted to be charged with fluid under pressure.

It has for its object to provide a valvecontrol of the character described of simple, strong, cheap, and novel construction, efficient in operation for the purposes for which it is adapted to be used and having its valvemechanism operatively mounted in an individual casing therefor, so constructed that the device may be removably attached, without disturbing the assembled position of said mechanism, in operative association with a perforated member of well-known construction or the like bearing the passage, which said device is adapted to control.

Another object is-to provide a valve-control of the character described having its valve-mechanism operatively mounted compactly in an individual casing therefor, said casing with said mechanism held in assembled position therein being adapted to be removably mounted in association with a member bearing the outwardly communicating passage of a chamber or the like, which passage the device is adapted to control, and said casing being, also, adapted as a removable cap for an end of said member.

Among the advantages of the device of this invention are that it is composed of few parts, that its mechanism is compactly assembled 1n operative position in an md -fl vidual casing therefor ready for conveniently mounting it in position for controllin the outwardly communicating passage of Z chamber or the like, is durable in use,

. and certain in operation.

Other objects and advantages are hereinafter stated and, moreover, this invention consists in the combination, arrangement, and construction of parts hereinafter more particularlydescribed in this specification and pointed out in the claims.

Inthe accompanying drawings forming part of this specification wherein like numbers of reference denote like parts wherever they occur, Figure 1 is a plan elevation of invention.

the casing and parts of the valve-control of this invention unassembled and removed from association with the perforated stem of a pneumatic tire or the like, the casing and parts being shown in substantially actual size suitable for ordinary use; Fig. 2 is a view, partly in longitudinal section and partly in plan elevation and on an enlarged scale, showing the parts depicted in Fig. 1 and an assembled valve-control of this -invention operatively mounted in association with a fragment of the perforated stem of a pneumatic tire and showing, also, the auxiliary dust-cap in closing position on the valve-casing; and Fig. 3 is a cross-sectional view on the line 3-3, Fig. 2.

A hollow cap 1, open at both ends, and a hollow point 2, also, open at both ends, may be provided, said cap and point being adapted to be removably united to form together the valve-casing for the valve-control of this The hollow crown of said cap may extend upwardly from shoulder 3 and may be internally screw-threaded at 4 at the base of said crown adjacent said shoulder, the upper end of point 2 being correspondingly externally screw-threaded at 5 to provide convenient means for removably uniting said cap and point together in the position best seen in Fig. 2.

The bore of the hollow portion of cap 1 adjacent the screw-threaded base of the crown of said cap may open upwardly into a slightly reduced bore 6 and the wall at the upper end of said reduced bore 6 may be sloped or beveled at 7 toward the adjacent inner end of relatively greatly reduced bore 8, the other end of said relatively greatly reduced bore being adapted to open outwardly through the top of the crown of cap v1, and a? depression or recess 9 may be provided in the outer surface of said crown adjacent the outer end of said greatly reduced bore 8.

The hollow portion of oint 2 may be provided with an enlarged ore 10 adapted to communicate at one end with the hollow crown of cap 1, when said cap and crown are united, and at the other end with one end of reduced bore 11, the other-end of said reduced bore being adapted to open outwardly of the reduced end 12 of said point 2, so that said reduced opening 11 is adapted to communicate outwardly of the valve-chamber in one directionand reduced opening 8 is adapted to communicate outwardly of the valve-chamber in the opposite direction when said cap and point are united by means of screw-threaded portions 5 and 4 to form said, valve-chamber, as best seen in Fig. 2, and a shoulder 13 may be provided in the hollow portion of point 2 adjacent the communication between enlarged bore 10 and reduced bore 11 thereof.

A member 14, adapted as a valve, may be a resilient member made of any suitable material, such, for instance, as rubber and may be mounted on stem 15 between flan 16 borne by said stem and bead 17 also borne by said stem, said member so mounted being adapted as a valve to control reduced opening 8, said beveled or sloped walls 7 being adapted as a valve-seat for said valve. Bead 17 may be adapted to fit slidably in reduced bore 8 and flange 16 may be adapted to fit loosely slidable in the vertical walled portion of bore 6,Vthe up er end of stem 15 above bead 17 being a apted to extend outwardly loosely slidable throu h bore 8, and the lower end of said stem be ow flange 16 being adapted to extend in the 0 posit/e direction loosely slidable outwardly through reduced opening 11 of point 2. 'A spiral spring 18 under relatively li ht tension may be provided, said spring icing mounted within the valve-chamber on stem 15 between flange 16 and shoulder 13, said sprin being adapted to hold member 14, adapted as a valve, normally in closed position wherein said member is seated on beveled or sloped walls 7, with bead 17 within reduced bore 8 and flange 16 within bore 6, substantially as shown in Fig. 2.

A convenient manner of assembling the parts hereinabove described consists in inserting stem 15 with member 14 mounted thereon and with the end-portion of sprin 18 adjacent flange 16 resting lightly around enlarged portion 19 borne by said stem and with the lower end of said stem extended into and through reduced opening 11 of mint 2, whereupon point 2 and cap 1 ma be joined together by means of screw-thread ed portions 5 and 4 thus inclosing the valvemechanism within a protecting casing formed by said cap and point.

In order convenientlv to mount the valvecontrol hereinabove escribed operatively in association with the externally screwthreaded outer end of the perforated valvestem 20 of the usual construction with'which a pneumatic tire is ordinarily equi ped, cap 1 may be provided with internally screwthreaded skirt 21 adapted for screwing said cap with point 2 attached thereto in place upon said perforated valve-stem with point 2 having its enlarged tapered portion adjacent the inner wall of the enlarged tapered terminal bore of the rforation of said valve-stem and having its reduced end-pop tion 12 extending inwardly adjacent the ina substantially fluid-tight joint when said cap is screwed in place on said tire valvestem in the position shown in Fig. 2. For facilitating t e point 2 together and of screwing cap 1 upon tire valve-stem 20, cap 1 may be provided with an annular knurled band 25 on its outer wall.

An auxiliary dust-cap 26 may be provided, said cap having its skirt internally screwthreaded for screwing the dust-ca in place upon'the externally screw-threa ed up r end-portion of cap 1, there being a Flsfiit 27 or the like composed of any suitab e material, such, for instance, between the end of said cap 1 and the adjacent portion of said dust-cap 26 to form a substantially fluid-tight joint, the inner surface of the crown of said dust-cap being provided with a recess 28 adapted to receive Elie adjacent end of stem 15, as shown in \Vhen the valve-control of this invention is moved to open position relative to reduced outlet 8, stem 15 will be moved inwardly to move bead 17 into the chamber adjacent sloped or beveled wall 7, member 14 will be unseated from its seat, flange 16 will be moved to the enlarged bore adjacent the screw-threaded base of the crown of cap 1, and spring 18 will be correspondingly compressed between flange 16 and shoulder 13, and in this position of the parts the outlet opening of reduced bore 8 and the outlet opening of reduced bore 1.. will be in com munication with each other for the passage of fluid therebetween.

If it is desired to dischar e the air or the like from the chamber, suc for instance, as a pneumatic tire with which tire-stem 20 is connected, this may be ver conveniently and expeditiously accom ished by removing ca 1 from stem 20 w ereby the valve-contro embodying the present invention may be removed from association with said stem leaving thepassa of said tire valve-stem free to dischar into the atmosphere, the removal of saiif cap 1 in no way disturbing the assembled parts ofthe valvecontrol contained within the casin formed by united cap 1v and point 2 and said valvecontrol may again be quickly and conveniently replaced in operative asoeiation with work of screwing cap 1 and as lead interposed tire valve-stem 20 by screwing cap 1 in place on said stem, as shown in Fig. 2.

A great advantage of the valve-control herein-above described is that the construction of parts is such that a pneumatic tire, for instance, may be charged therethrough with air under pressure to within about two pounds of the pressure existing in the reservoir or the like from which said air is drawn, so that,.for instance, should it be desired to charge the tire to a pressure of seventy-five pounds, the pressure in the reservoir or other charging source of supply need be only about seventy-seven pounds.

Another advantage of the present invention is that the outlet opening of bore 8 is substantially closed by means of bead 17 so that dust and dirt is excluded from the valve-chamber within the casing formed by cap 1 and point 2 and the parts within said chamber are protected from the access thereto of dirt and dusteven when auxiliary dus 1 cap 26 is not used. Furthermore, the valvecontrol of this invention'may be assembled within the casing formed by uniting cap 1 and point 2 so that said valve-control is ready to be quickly adjusted in operative position in connection with a tire valvestem 20 by simply screwing cap 1 in place on said valve-stem in the position shown in Fig. 2, which operation may be performed without the use of tools.

In addition to serving as an outlet communication for the valve chamber, reduced perforation 11 is, also, adapted as a guiding means for the end of stem 15 slidably mounted therethrough.

An object in assembling the parts of the valve-control operatively mounted in. association with a casing therefor, as hereinabove described, is to attain the advantage of providing a compact valve-control wellprotected against injury so that it may ,be handledby unskilled users without having its adjusted and assembled parts damaged in any way or lost, and, also, to provide a device that may readily be associated operaeating with said passage quickly, the operatively with the passage it is designed to control by anyone, even though he has little or practically noskill as a mechanic'and without the use of tools. Moreover, the valve-control of this invention may be quickly and conveniently removed from the member, such as stem 20, the passage of which it is designed to control, should it be desired to exhaust the chamber communis tion of removing thedevice of this invention being performedwithout disturbing the assembled position of its mechanism, thus preventing the loss or mal-adjustment of its parts. which often occurs as a result of lar operations in the case of valve-controls of other constructions now generally in use. Furthermore, another advantage of the device of this invention is that its construction is such that its valve-mechanism will operate to hold in closed position even under very low pressure of fluid, say, for instance a pressure of one and a half or two pounds to the square inch, in a tire or other receptacle with which the device may be associated, thus permitting tire manufacturers and others to ship tires with avery low pressure of air therein if desired, when same are equipped with the valve-control of this in- -vention.

Various changes'in the construction, arrangemmt, and construction of parts may be made without departing from the nature and spirit of the present invention.

I claim:

, 1. In a device of thecharacter described, a two-part valve-casing comprising an internally threaded cap and a point externally threaded to engage the threads on said cap in combination with a tire valve-stem to which said cap is connected, said-tire valvestem having a bore formedwith an enlarged portion and a tapered portion, said point having an enlarged portion and a tapered portion, said enlarged portion of said point making a tight fit with said enlarged portion of said here and said tapered portion of said point makin an air-tight fit with the tapered portion 0 said bore, a valve seat formed on said cap, a valve and stem for said valve, and means for normally holding said valve on said-valve seat.

2. In a device of the character described, a two-part valve-casing comprising an internally-threaded cap and a point externally threaded to'engage the threads on said cap in combination with a tire valve-stem to which said cap is connected, saidtire valvestem having a bore formed with an enlarged portion and a tapered'portion, said point having an enlarged portion and a taperedv portion, said enlarged portion of said point .making a tight fit with said enlarged portion of said bore and said tapered ortion of .said'point making an air-tight t with the tapered portion of said bore, a valve seat formed on said cap, a valve and stem for said valve,said cap and point having restricted openings in their upper and lower ends respectively and the ends of said valve stem extending slidably through and being d guided by said openin s, and means for normally holding said vave on. said valve seat.

p n testimony whereof I hereunto afiix my signature. a u

.' JOHN A. KE-ISTERQ I 

